20645690

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:207

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 21932230

約数列:

[1, 2, 5, 10, 13, 26, 31, 47, 62, 65, 94, 109, 130, 155, 218, 235, 310, 403, 470, 545, 611, 806, 1090, 1222, 1417, 1457, 2015, 2834, 2914, 3055, 3379, 4030, 5123, 6110, 6758, 7085, 7285, 10246, 14170, 14570, 16895, 18941, 25615, 33790, 37882, 43927, 51230, 66599, 87854, 94705, 133198, 158813, 189410, 219635, 317626, 332995, 439270, 665990, 794065, 1588130, 2064569, 4129138, 10322845, 20645690]

約数ペア:

[(1, 20645690), (2, 10322845), (5, 4129138), (10, 2064569), (13, 1588130), (26, 794065), (31, 665990), (47, 439270), (62, 332995), (65, 317626), (94, 219635), (109, 189410), (130, 158813), (155, 133198), (218, 94705), (235, 87854), (310, 66599), (403, 51230), (470, 43927), (545, 37882), (611, 33790), (806, 25615), (1090, 18941), (1222, 16895), (1417, 14570), (1457, 14170), (2015, 10246), (2834, 7285), (2914, 7085), (3055, 6758), (3379, 6110), (4030, 5123)]